At May 1, 2020, Oriole Company had beginning inventory consisting of 210 units with a unit cost of $5.50. During May, the company purchased inventory as follows: 620 units at $5.50 670 units at $10.00 The company sold 890 units during the month for $12 per unit. Oriole uses the averag-cost method. The average-cost per unit for May is O $7.500. O $6.500. O $7.510. O $5.500